1206 2010 2512 Notes
Power rating @70°C watts 0.3 0.5 1
Limiting element voltage volts 1000 2000 3000 DC or AC peak
Resistance range ohms 100K to 100M Consult factory for
out of range values
Resistance tolerance % 0.5, 1, 2, 5, 10 See table of
value ranges
TCR ppm/°C 100
Ambient temperature range °C -55 to +155
Values E24 & E96 preferred Any value to order
Thermal Impedance °C/W 200 80 70
Tolerance %
Size 10 5 2 1 0.5
1206 100K to 100M 100K to 100M 100K to 10M 100K to 2M N/A
2010 100K to 100M 100K to 100M 100K to 10M 100K to 10M N/A
2512 100K to 100M 100K to 100M 100K to 10M 100K to 10M 100K to 10M
High Voltage
Chip Resistors
HVC Series
•Continuous voltages up to 3kV
•Values up to 100M
•Tolerances to ±0.5%
•Robust thick film construction
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Electrical Data
Issue C · 10.03
A subsidiary of
TT electronics plc
Welwyn Components
84
Value Ranges (ohms)
Dimensions (mm) & Weight (g)
L W T nom A B* C Wt.
1206 3.2±0.2 1.6±0.2 0.6 0.35±0.2 1.95 min 0.35±0.2 0.010
2010 5.1±0.2 2.5±0.2 0.7 0.45±0.2 3.70 min 0.45±0.25 0.035
2512 6.5±0.2 3.2±0.2 0.7 0.45±0.2 5.00 min 0.4±0.2 0.055
Physical Data
T
W
A
A
B
L
Wrap-around terminations
(3 faces)
HVC_C.qxd 23/10/03 4:18 PM Page 1
High Voltage
Chip Resistors
HVC Series
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com Issue C · 10.03
Welwyn Components
85
Maximum Typical
Load at rated power: 1000 hours at 70°C ∆R% 0.5 0.25
Shelf life test: 12 months at room temperature ∆R% 0.1 0.02
Derating from rated power at 70°C Zero at 155°C
Short term overload: Lesser of 6.25 x rated power or 1.5 x LEV for 2S ∆R% 0.5 0.1
Dry heat: 1000 hours at 155°C ∆R% 0.5 0.2
Long term damp heat ∆R% 0.5 0.25
Temperature rapid change ∆R% 0.25 0.05
Resistance to solder heat ∆R% 0.25 0.05
Voltage proof Volts 500
Voltage coefficient of resistance ppm/V 1206: -25 1206: -15
2010: -15 2010: -5
2512: -5 2512: -1.5
Performance Data
Application Notes
Construction
Resistive thick film material, overglaze and organic protection
are screen printed on a 96% alumina substrate. The design
and laser adjustment of the resistive element optimises the
limiting element voltage of the resistor.
Terminations
The chips are supplied with wrap-around terminations suitable
for soldering. Consult factory for alternative termination
options.
Solderability
The terminations have an electroplated nickel barrier and
tin-lead solder coating, and this ensures excellent ‘leach’
resistance properties and solderability.
Marking
The body protection is resistant to all normal cleaning solvents
suitable for printed circuits.
The chips are not marked and the relevant information type,
value, tolerance date code and quantity are recorded on the reel.
HVC resistors are ideally suited for handling by automatic
methods due to their rectangular shape and the small
dimensional tolerances. Electrical connection to a ceramic
substrate or to a printed circuit board can be made by reflow
or wave soldering of wrap-around terminations.
Wrap-around terminations provide good leach properties and
ensure reliable contact. Due to the robust construction, the
HVC can be immersed in the solder bath for 30 seconds at
260°C. This enables the resistor to be mounted on one side
of a printed circuit board and wire-leaded components
applied on the other side.
HVC resistors themselves can operate at a maximum
temperature of 155°C (see performance above). For soldered
resistors, the joint temperature should not exceed 110°C.
This condition is met when the stated power levels at 70°C
are used.
The PCB layout should avoid tracks running between the HVC
mounting pads, as this would compromise the LEV.
The LEV stated applies to operation at sea-level pressure and
in a non-condensing atmosphere. Voltage derating should be
applied if low pressure or high humidity may be encountered.
The termination clearance dimension (B) should be used in
conjunction with the creepage limit applicable to the circuit
application in order to determine the derated LEV.
HVC_C.qxd 23/10/03 4:18 PM Page 2
Type HVC 2512 - 4M7 F I
Size
Resistance value
(IEC62 code)
Tolerance
High Voltage
Chip Resistors
HVC Series
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com Issue C · 10.03
Welwyn Components
86
Packaging
HVC Resistors are supplied taped and reeled as per IEC 286-3.
Tape and reel dimensions (mm) Qty.
Wr W P1 P0 P2 D0 D1 E F A0 B0 K0 T T1 T2 per
±0.5 ±0.3 ±0.1 ±0.1 ±0.05 ±0.1 ±0.2 ±0.1 ±0.05 ±0.1 ±0.1 ±0.1 ±0.05 Nom. ±0.15 reel
1206 9 8 4 4 2 1.5 1 1.75 3.5 1.95 3.55 1.0 0.2 0.05 1.3 3000
2010 13 12 8 4 2 1.5 1.5 1.75 5.5 2.79 5.89 0.91 0.28 0.06 1.21 3000
2512 13 12 8 4 2 1.5 1.5 1.75 5.5 3.61 6.96 1.17 0.28 0.06 1.45 1800
D 0.5%
F1%
G2%
J5%
K 10%
Ordering Procedure
Specify type reference etc. as shown in this example of HVC2512 at 4.7MΩ1:
2.5 ± 0.5
13 ± 0.5
33 ± 1.0
Marking
(Both sides)
0.8 ± 0.15
80 ± 2
178 ± 2
Wr
P1
A0
B0
D1
D0
P0
P2
GF
W
E
T2
T1
K0
T
Spare
HVC_C.qxd 23/10/03 4:18 PM Page 3
